19971705

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:178

約数の個数: 64

約数和(自身を含む): 36997632

約数和(自身を除く): 17025927

約数列:

[1, 3, 5, 13, 15, 23, 39, 61, 65, 69, 73, 115, 183, 195, 219, 299, 305, 345, 365, 793, 897, 915, 949, 1095, 1403, 1495, 1679, 2379, 2847, 3965, 4209, 4453, 4485, 4745, 5037, 7015, 8395, 11895, 13359, 14235, 18239, 21045, 21827, 22265, 25185, 54717, 57889, 65481, 66795, 91195, 102419, 109135, 173667, 273585, 289445, 307257, 327405, 512095, 868335, 1331447, 1536285, 3994341, 6657235, 19971705]

約数ペア:

[(1, 19971705), (3, 6657235), (5, 3994341), (13, 1536285), (15, 1331447), (23, 868335), (39, 512095), (61, 327405), (65, 307257), (69, 289445), (73, 273585), (115, 173667), (183, 109135), (195, 102419), (219, 91195), (299, 66795), (305, 65481), (345, 57889), (365, 54717), (793, 25185), (897, 22265), (915, 21827), (949, 21045), (1095, 18239), (1403, 14235), (1495, 13359), (1679, 11895), (2379, 8395), (2847, 7015), (3965, 5037), (4209, 4745), (4453, 4485)]